I personally wouldnt add any N to you mix (depending on what you are using) unless they show the signs of a diff.

It's easy to tell, just wait and react to the plant as it tells you what it needs more of. You can find loads of information on this site and other sites that help to identify the more common diff's
razzapiggy Reviewed by razzapiggy on . more noob questions When do you start counting your weeks in flower, when you switch to 12/12 or when they start making bud? Also when I go to 12/12 I am getting some N def. and dropping some lower leaves. Should I use veg nutes until stretch is over? Using rockwool in hydro. Rating: 5